Interface control of electronic transport across the magnetic phase transition in SrRuO_3/SrTiO_3 heterointerface

摘要

The emerging material class of complex-oxides, where manipulation of physicalproperties lead to new functionalities at their heterointerfaces, is expectedto open new frontiers in Spintronics. For example, SrRuO_3 is a promisingmaterial where external stimuli like strain, temperature and structuraldistortions control the stability of electronic and magnetic states, across itsmagnetic phase transition, useful for Spintronics. Despite this, not much hasbeen studied to understand such correlations in SrRuO_3. Here we explore theinfluence of electron-lattice correlation to electron-transport, at interfacesbetween SrRuO_3 and Nb:SrTiO_3 across its ferromagnetic transition, using ananoscale transport probe and first-principles calculations. We find that thegeometrical reconstructions at the interface and hence modifications inelectronic structures dominate the transmission across its ferromagnetictransition, eventually flipping the charge-transport length-scale in SrRuO_3.This approach can be easily extended to other devices where competing groundstates can lead to different functional properties across theirheterointerfaces.